CCPS Process Safety Glossary
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Inputs that accept on/off signals form limit switches, push buttons, and... Read More... |
The standard deviation s in a specified direction of the gaussian... Read More... |
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óy (lateral component), óz (vertical component), and óx (along-wind... Read More... |
Mathematical models that characterize the transport of toxic/flammable... Read More... |
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A scaling length that becomes important for describing the wind profile at... Read More... |
Recirculation zones adjacent to buildings or other obstacles where the flow... Read More... |
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A chemical reaction in which a single compound serves as both oxidizing and... Read More... |
See “Effective Conductivity.” |
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The performance of the same overall protective function by a number of... Read More... |
The triggering of secondary events, such as toxic releases, by a primary... Read More... |
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Time-integrated concentration |
A method (developed by Dow Chemical Company) for ranking the relative fire... Read More... |
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The surface stress, ôo, arises through direct viscous stress and through the... Read More... |
The negative of the temperature gradient established as dry air ascending in... Read More... |
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Effective downward vertical velocity of small aerosols and gases if they are... Read More... |
A flame arrester that uses an element consisting of small gaps or apertures... Read More... |
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Differential Scanning Calorimetry; A technique in which the difference of... Read More... |
Differential Thermal Analysis; A technique in which the temperature... Read More... |
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The length of time for which the event state exists. Can be the repair time... Read More... |
Any finely divided solid, 420 microns or 0.017 inches, or less in diameter (... Read More... |
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Consists of processor routines in conjunction with external hardware under... Read More... |
Models that predict effects of incident outcomes usually with respect to... Read More... |
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For an incident that produces an incidnet outcome of toxic release, the area... Read More... |
The charging process in liquids of low conductivity alters the concentration... Read More... |
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The spark ignition energy (J) of the least easily ignitable flammable... Read More... |
Defined as the vertical integral of the concentration-weighted wind speed,... Read More... |
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A measure of the force exerted by one charged body on another. Imaginary “... Read More... |
Electromagnetic phenomena which, either directly or indirectly, can... Read More... |
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The phenomenon of particle migration in an electric field. |
An early device for generating charge by induction, attributed to and named... Read More... |
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The portion of a graphical Language corresponding to an Instruction in... Read More... |
Pollutant releases at elevations above about 10 or 20 m. |
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Actions that should be taken at the time of a chemical exposure before... Read More... |
Maximum concentration levels that provide guidance in advance planning for... Read More... |
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Process changes initiated by the operations staff to place the process into... Read More... |
A device that is designed to open during emergency or abnormal conditions to... Read More... |